EZ Cartridges are disposable, single-use tattoo needle cartridges that allow tattoo artists to set up and switch needle configurations quickly during the tattooing process. Made of 316 Stainless Steel, E.O. Sterilized and packaged in blister packs.These high quality, rubber band based needle cartridges do not have membranes and can be used with most tattoo machines. Pack of 20.